<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul v-for="cart in cartList" :key="cart.id" class="cart-list">
          <li class="cart-list-con1">
            <input @change="checkCartOne(cart)" type="checkbox" :checked="cart.isChecked == 1 " name="chk_list">
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl">
            <div class="item-msg">{{cart.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{cart.skuPrice}}</span>
          </li>
          <li class="cart-list-con5">
            <a @click="handler('minus',-1,cart)" class="mins">-</a>
            <input @change="handler('change',$event.target.value*1,cart)" autocomplete="off" type="text" :value="cart.skuNum" minnum="1" class="itxt">
            <a @click="handler('add',1,cart)" class="plus">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{cart.skuNum*cart.skuPrice}}</span>
          </li>
          <li class="cart-list-con7">
            <a @click="deleteCart(cart.skuId)" class="sindelet">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input @change="checkCartAll" class="chooseAll" :checked="isAllChecked&& cartList.length>0" type="checkbox">
      
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteChecked">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>0</span>件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalPrice}}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" target="_blank">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
// 按需引入防抖节流函数lodash
import throttle from 'lodash/throttle'
// 引入vuex助手函数
import { mapState } from 'vuex'
export default {
  name: 'ShopCart',
  mounted() {
    this.getData()
  },
  methods: {
    // 获取个人购物车数据
    getData() {
      this.$store.dispatch('getShopCartList')
    },
    // 数量按钮改变事件
    handler: throttle(function (type, disNum, cart) {
      switch (type) {
        case 'add':
          disNum = 1
          break
        case 'minus':
          // 判断产品的个数大于1,才可以传递给服务器-1
          // 如果产品个数小于等于1,传递0给服务器
          disNum = cart.skuNum > 1 ? -1 : 0
          break
        case 'change':
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0
          } else {
            disNum = parseInt(disNum) - cart.skuNum
          }
          break
      }
      // 派发action
      this.$store
        .dispatch('addOrUpdateShopcar', { skuId: cart.skuId, skuNum: disNum })
        .then(() => {
          // 再一次获取数据展示
          this.getData()
        })
        .catch(() => {
          alert('修改失败')
        })
    }, 500),

    // 删除购物车商品
    deleteCart(skuId) {
      
      this.$store.dispatch('deleteCartById', skuId).then(() => {
        this.getData()
      })
    },
    // 全选按钮
    checkCartAll(e) {
      let that = this
      
      if (e.target.checked) {
        var isChecked = 1
      } else {
        isChecked = 0
      }
      this.cartList.forEach(function (item) {
        that.$store.dispatch('checkCart', { skuId: item.skuId, isChecked:isChecked }).then(() => {
          that.getData()
        })
      })
    },
    // 切换单个商品选中状态
    checkCartOne(cart) {
      // console.log(cart.skuId,cart.isChecked);
      let skuId = cart.skuId
      let isChecked = cart.isChecked == 1 ? 0 : 1
      this.$store.dispatch('checkCart', { skuId, isChecked }).then(() => {
        this.getData()
      })
    },
    // 删除选中的商品
    deleteChecked(){
      // 循环购物车列表,删除选中状态为1的商品 isChecked== 1
    let that = this
      this.cartList.forEach(function(item){
        if(item.isChecked==1){
          that.deleteCart(item.skuId)
        }
        
      })
      // that.getData()
    }
  },
  computed: {
    ...mapState({
      cartList: state => state.shopcar.shopCartList || []
    }),
    // 计算产品总价格
    totalPrice() {
      let sum = 0
      this.cartList.forEach(item => {
        sum += item.skuNum * item.skuPrice
      })
      return sum
    },
    // 判断底部复选框是否勾选
    isAllChecked() {
      return this.cartList.every(item => item.isChecked == 1)
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>